split out node callback between tinygo and go to avoid heap allocs

internet/definitions_go.go

@@ -0,0 +1,26 @@
+//go:build !tinygo
+
+package internet
+
+func makecbnode(s StackNode) cbnode {
+	return cbnode{
+		_s: s,
+	}
+}
+
+type cbnode struct {
+	// Do not access outside of handlers/node logic.
+	_s StackNode
+}
+
+func (s cbnode) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (int, error) {
+	return s._s.Encapsulate(carrierData, offsetToIP, offsetToFrame)
+}
+
+func (s cbnode) Demux(carrierData []byte, frameOffset int) error {
+	return s._s.Demux(carrierData, frameOffset)
+}
+
+func (s cbnode) IsZeroed() bool {
+	return s._s == nil
+}